diff --git a/motorApp/AcsSrc/drvMCB4B.cc b/motorApp/AcsSrc/drvMCB4B.cc
index 93f65f3f..9e52c2cc 100644
--- a/motorApp/AcsSrc/drvMCB4B.cc
+++ b/motorApp/AcsSrc/drvMCB4B.cc
@@ -287,6 +287,7 @@ STATIC RTN_STATUS send_mess(int card, const char *com, char *name)
 {
     char buff[BUFF_SIZE];
     struct MCB4Bcontroller *cntrl;
+    int nwrite;
 
     /* Check that card exists */
     if (!motor_state[card])
@@ -305,7 +306,7 @@ STATIC RTN_STATUS send_mess(int card, const char *com, char *name)
     Debug(2, "send_mess: sending message to card %d, message=%s\n",\
                      card, buff);
 
-    pasynOctetSyncIO->write(cntrl->pasynUser, buff, strlen(buff), TIMEOUT);
+    pasynOctetSyncIO->write(cntrl->pasynUser, buff, strlen(buff), TIMEOUT, &nwrite);
 
     return (OK);
 }
@@ -318,7 +319,8 @@ STATIC RTN_STATUS send_mess(int card, const char *com, char *name)
 STATIC int recv_mess(int card, char *com, int flag)
 {
     double timeout;
-    int len=0;
+    int nread=0;
+    asynStatus status;
     struct MCB4Bcontroller *cntrl;
     int flush;
     int eomReason;
@@ -341,18 +343,18 @@ STATIC int recv_mess(int card, char *com, int flag)
         flush = 0;
         timeout = TIMEOUT;
     }
-    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, MAX_MSG_SIZE, 
-                            "\r", 1, flush, timeout, &eomReason);
+    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, MAX_MSG_SIZE, 
+                            "\r", 1, flush, timeout, &nread, &eomReason);
 
     /* The response from the MCB4B is terminated with CR.  Remove */
-    if (len < 1) com[0] = '\0'; 
-    else com[len-1] = '\0';
+    if (nread < 1) com[0] = '\0'; 
+    else com[nread-1] = '\0';
     
-    if (len > 0) {
+    if (nread > 0) {
         Debug(2, "recv_mess: card %d, message = \"%s\"\n",\
                    card, com);
     }
-    if (len == 0) {
+    if (nread == 0) {
         if (flag != FLUSH)  {
             Debug(1, "recv_mess: card %d ERROR: no response\n",\
                   card);
@@ -362,7 +364,7 @@ STATIC int recv_mess(int card, char *com, int flag)
         }
     }
 
-    return (len);
+    return (nread);
 }
 
 
diff --git a/motorApp/MclennanSrc/drvPM304.cc b/motorApp/MclennanSrc/drvPM304.cc
index 9b286507..78f92aa8 100644
--- a/motorApp/MclennanSrc/drvPM304.cc
+++ b/motorApp/MclennanSrc/drvPM304.cc
@@ -348,7 +348,7 @@ STATIC RTN_STATUS send_mess(int card, const char *com, char *name)
     char buff[BUFF_SIZE];
     char response[BUFF_SIZE];
     struct PM304controller *cntrl;
-    int eomReason;
+    int nwrite, nread, eomReason;
 
     /* Check that card exists */
     if (!motor_state[card])
@@ -369,7 +369,7 @@ STATIC RTN_STATUS send_mess(int card, const char *com, char *name)
         strcat(buff, OUTPUT_TERMINATOR);
         Debug(2, "send_mess: sending message to card %d, message=%s\n", card, buff);
 	pasynOctetSyncIO->writeRead(cntrl->pasynUser, buff, strlen(buff), response,
-			    BUFF_SIZE, INPUT_TERMINATOR, 1, TIMEOUT, &eomReason);
+			    BUFF_SIZE, INPUT_TERMINATOR, 1, TIMEOUT, &nwrite, &nread, &eomReason);
         Debug(2, "send_mess: card %d, response=%s\n", card, response);
     }
 
@@ -389,11 +389,11 @@ STATIC RTN_STATUS send_mess(int card, const char *com, char *name)
 STATIC int recv_mess(int card, char *com, int flag)
 {
     double timeout;
-    int len=0;
     char *pos;
     char temp[BUFF_SIZE];
     int flush;
-    int eomReason;
+    asynStatus status;
+    int nread=0, eomReason;
     struct PM304controller *cntrl;
 
     com[0] = '\0';
@@ -413,15 +413,15 @@ STATIC int recv_mess(int card, char *com, int flag)
         flush = 0;
         timeout = TIMEOUT;
     }
-    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, 
-                            INPUT_TERMINATOR, 1, flush, timeout, &eomReason);
+    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, 
+                            INPUT_TERMINATOR, 1, flush, timeout, &nread, &eomReason);
 
     /* The response from the PM304 is terminated with CR/LF.  Remove these */
-    if (len < 2) com[0] = '\0'; else com[len-2] = '\0';
-    if (len > 0) {
+    if (nread < 2) com[0] = '\0'; else com[nread-2] = '\0';
+    if (nread > 0) {
         Debug(2, "recv_mess: card %d, flag=%d, message = \"%s\"\n", card, flag, com);
     }
-    if (len == 0) {
+    if (nread == 0) {
         if (flag != FLUSH)  {
             Debug(1, "recv_mess: card %d read ERROR: no response\n", card);
         } else {
@@ -458,9 +458,9 @@ STATIC int send_recv_mess(int card, const char *out, char *response)
     char *p, *tok_save;
     char buff[BUFF_SIZE];
     struct PM304controller *cntrl;
-    int len=0;
     char *pos;
-    int eomReason;
+    asynStatus status;
+    int nwrite, nread=0, eomReason;
     char temp[BUFF_SIZE];
 
     response[0] = '\0';
@@ -483,17 +483,17 @@ STATIC int send_recv_mess(int card, const char *out, char *response)
         strcpy(buff, p);
         strcat(buff, OUTPUT_TERMINATOR);
         Debug(2, "send_recv_mess: sending message to card %d, message=%s\n", card, buff);
-	len = pasynOctetSyncIO->writeRead(cntrl->pasynUser, buff, strlen(buff), 
+	status = pasynOctetSyncIO->writeRead(cntrl->pasynUser, buff, strlen(buff), 
                          response, BUFF_SIZE, INPUT_TERMINATOR, 1, TIMEOUT,
-                         &eomReason);
+                         &nwrite, &nread, &eomReason);
     }
 
     /* The response from the PM304 is terminated with CR/LF.  Remove these */
-    if (len < 2) response[0] = '\0'; else response[len-2] = '\0';
-    if (len > 0) {
+    if (nread < 2) response[0] = '\0'; else response[nread-2] = '\0';
+    if (nread > 0) {
         Debug(2, "send_recv_mess: card %d, response = \"%s\"\n", card, response);
     }
-    if (len == 0) {
+    if (nread == 0) {
         Debug(1, "send_recv_mess: card %d ERROR: no response\n", card);
     }
     /* The PM600 always echoes the command sent to it, before sending the response.  It is terminated
diff --git a/motorApp/NewportSrc/drvESP300.cc b/motorApp/NewportSrc/drvESP300.cc
index d63b4631..12c00dc6 100644
--- a/motorApp/NewportSrc/drvESP300.cc
+++ b/motorApp/NewportSrc/drvESP300.cc
@@ -2,9 +2,9 @@
 FILENAME...	drvESP300.cc
 USAGE...	Motor record driver level support for Newport ESP300.
 
-Version:	$Revision: 1.14 $
-Modified By:	$Author: sluiter $
-Last Modified:	$Date: 2004-09-21 14:47:01 $
+Version:	$Revision: 1.15 $
+Modified By:	$Author: rivers $
+Last Modified:	$Date: 2004-09-28 23:52:58 $
 */
 
 /*
@@ -352,6 +352,7 @@ static RTN_STATUS send_mess(int card, char const *com, char *name)
     struct MMcontroller *cntrl;
     char local_buff[BUFF_SIZE];
     int size;
+    int nwrite;
 
     size = strlen(com);
 
@@ -383,7 +384,7 @@ static RTN_STATUS send_mess(int card, char const *com, char *name)
     cntrl = (struct MMcontroller *) motor_state[card]->DevicePrivate;
 	
     pasynOctetSyncIO->write(cntrl->pasynUser, local_buff, strlen(local_buff), 
-                       SERIAL_TIMEOUT);
+                       SERIAL_TIMEOUT, &nwrite);
     
     return(OK);
 }
@@ -437,7 +438,8 @@ static int recv_mess(int card, char *com, int flag)
     struct MMcontroller *cntrl;
     double timeout = 0.;
     int flush = 1;
-    int len = 0;
+    int nread = 0;
+    asynStatus status;
     int eomReason;
 
     /* Check that card exists */
@@ -450,32 +452,32 @@ static int recv_mess(int card, char *com, int flag)
         flush = 0;
 	timeout	= SERIAL_TIMEOUT;
     }
-    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE,
-                            "\n", 1, flush, timeout, &eomReason);
-    if (len > 3 && com[0] == 'E')
+    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE,
+                            "\n", 1, flush, timeout, &nread, &eomReason);
+    if (nread > 3 && com[0] == 'E')
     {
 	long error;
 
 	error = strtol(&com[1], NULL, 0);
 	if (error >= 35 && error <= 42)
-	    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, 
-                                    "\n", 1, flush, timeout, &eomReason);
+	    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, 
+                                    "\n", 1, flush, timeout, &nread, &eomReason);
     }
 
-    if (len <= 0)
+    if ((status != asynSuccess) || (nread <= 0))
     {
 	com[0] = '\0';
-	len = 0;
+	nread = 0;
     }
     else
 	/* ESP300 responses are always terminated with CR/LF combination (see
 	 * ESP300 User' Manual Sec. 3.4 NOTE). Strip both CR&LF from buffer
 	 * before returning to caller.
 	 */
-	com[len-2] = '\0';
+	com[nread-2] = '\0';
 
     Debug(2, "recv_mess(): message = \"%s\"\n", com);
-    return(len);
+    return(nread);
 }
 
 
diff --git a/motorApp/NewportSrc/drvMM3000.cc b/motorApp/NewportSrc/drvMM3000.cc
index 45a1bddf..29149e69 100644
--- a/motorApp/NewportSrc/drvMM3000.cc
+++ b/motorApp/NewportSrc/drvMM3000.cc
@@ -2,9 +2,9 @@
 FILENAME...	drvMM3000.cc
 USAGE...	Motor record driver level support for Newport MM3000.
 
-Version:	$Revision: 1.13 $
-Modified By:	$Author: sluiter $
-Last Modified:	$Date: 2004-09-21 14:45:38 $
+Version:	$Revision: 1.14 $
+Modified By:	$Author: rivers $
+Last Modified:	$Date: 2004-09-28 23:52:58 $
 */
 
 /*
@@ -388,6 +388,7 @@ STATIC RTN_STATUS send_mess(int card, char const *com, char *name)
     struct MMcontroller *cntrl;
     char local_buff[BUFF_SIZE];
     int size;
+    int nwrite;
 
     size = strlen(com);
 
@@ -419,7 +420,7 @@ STATIC RTN_STATUS send_mess(int card, char const *com, char *name)
     cntrl = (struct MMcontroller *) motor_state[card]->DevicePrivate;
 
     pasynOctetSyncIO->write(cntrl->pasynUser, local_buff, strlen(local_buff), 
-                       SERIAL_TIMEOUT);
+                       SERIAL_TIMEOUT, &nwrite);
     
     return(OK);
 }
@@ -473,8 +474,9 @@ STATIC int recv_mess(int card, char *com, int flag)
     struct MMcontroller *cntrl;
     double timeout = 0.;
     int flush = 1;
-    int len = 0;
+    int nread = 0;
     int eomReason;
+    asynStatus status;
 
     /* Check that card exists */
     if (!motor_state[card])
@@ -486,23 +488,23 @@ STATIC int recv_mess(int card, char *com, int flag)
         flush = 0;
 	timeout	= SERIAL_TIMEOUT;
     }
-    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, (char *) 
-                            "\n", 1, flush, timeout, &eomReason);
-    if (len > 3 && com[0] == 'E')
+    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, (char *) 
+                            "\n", 1, flush, timeout, &nread, &eomReason);
+    if (nread > 3 && com[0] == 'E')
     {
 	long error;
 
 	error = strtol(&com[1], NULL, 0);
 	if (error >= 35 && error <= 42)
-	    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, 
+	    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, 
                                     (char *) "\n", 1, flush, timeout,
-                                    &eomReason);
+                                    &nread, &eomReason);
     }
 
-    if (len <= 0)
+    if ((status != asynSuccess) || (nread <= 0))
     {
 	com[0] = '\0';
-	len = 0;
+	nread = 0;
     }
     else
     {
@@ -510,7 +512,7 @@ STATIC int recv_mess(int card, char *com, int flag)
 	 * MM3000 User' Manual Sec. 3.4 NOTE). Strip both CR&LF from buffer
 	 * before returning to caller.
 	 */
-	com[len-2] = '\0';
+	com[nread-2] = '\0';
 	/* Test for "system error" response. */
 	if (com[0] == 'E')
 	{
@@ -520,7 +522,7 @@ STATIC int recv_mess(int card, char *com, int flag)
     }
 
     Debug(2, "recv_mess(): message = \"%s\"\n", com);
-    return (len);
+    return (nread);
 }
 
 
diff --git a/motorApp/NewportSrc/drvMM4000.cc b/motorApp/NewportSrc/drvMM4000.cc
index 38be7e92..2e4e5bd4 100644
--- a/motorApp/NewportSrc/drvMM4000.cc
+++ b/motorApp/NewportSrc/drvMM4000.cc
@@ -2,9 +2,9 @@
 FILENAME...	drvMM4000.cc
 USAGE...	Motor record driver level support for Newport MM4000.
 
-Version:	$Revision: 1.13 $
-Modified By:	$Author: sluiter $
-Last Modified:	$Date: 2004-09-21 14:48:33 $
+Version:	$Revision: 1.14 $
+Modified By:	$Author: rivers $
+Last Modified:	$Date: 2004-09-28 23:52:59 $
 */
 
 /*
@@ -462,6 +462,7 @@ static RTN_STATUS send_mess(int card, char const *com, char *name)
     struct MMcontroller *cntrl;
     char local_buff[BUFF_SIZE];
     int size;
+    int nwrite;
 
     size = strlen(com);
 
@@ -493,7 +494,7 @@ static RTN_STATUS send_mess(int card, char const *com, char *name)
     cntrl = (struct MMcontroller *) motor_state[card]->DevicePrivate;
 
     pasynOctetSyncIO->write(cntrl->pasynUser, local_buff, strlen(local_buff), 
-                       TIMEOUT);
+                       TIMEOUT, &nwrite);
 
     return(OK);
 }
@@ -520,7 +521,8 @@ static int recv_mess(int card, char *com, int flag)
     struct MMcontroller *cntrl;
     double timeout = 0.;
     int flush = 0;
-    int len = 0;
+    int nread = 0;
+    asynStatus status;
     int eomReason;
 
     /* Check that card exists */
@@ -530,19 +532,19 @@ static int recv_mess(int card, char *com, int flag)
     cntrl = (struct MMcontroller *) motor_state[card]->DevicePrivate;
 
     timeout	= TIMEOUT;
-    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, (char *) "\r", 
-                            1, flush, timeout, &eomReason);
+    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, (char *) "\r", 
+                            1, flush, timeout, &nread, &eomReason);
 
-    if (len <= 0)
+    if ((status != asynSuccess) || (nread <= 0))
     {
 	com[0] = '\0';
-	len = 0;
+	nread = 0;
     }
     else
-	com[len-1] = '\0';
+	com[nread-1] = '\0';
 
     Debug(2, "recv_mess(): message = \"%s\"\n", com);
-    return(len);
+    return(nread);
 }
 
 
diff --git a/motorApp/NewportSrc/drvPM500.cc b/motorApp/NewportSrc/drvPM500.cc
index 28aad8c0..09f49dca 100644
--- a/motorApp/NewportSrc/drvPM500.cc
+++ b/motorApp/NewportSrc/drvPM500.cc
@@ -2,9 +2,9 @@
 FILENAME...	drvPM500.cc
 USAGE...	Motor record driver level support for Newport PM500.
 
-Version:	$Revision: 1.12 $
-Modified By:	$Author: sluiter $
-Last Modified:	$Date: 2004-09-21 14:57:12 $
+Version:	$Revision: 1.13 $
+Modified By:	$Author: rivers $
+Last Modified:	$Date: 2004-09-28 23:52:59 $
 */
 
 /* Device Driver Support routines for PM500 motor controller */
@@ -346,6 +346,7 @@ static RTN_STATUS send_mess(int card, char const *com, char *name)
     struct MMcontroller *cntrl;
     char local_buff[BUFF_SIZE];
     int size;
+    int nwrite;
 
     size = strlen(com);
 
@@ -372,7 +373,7 @@ static RTN_STATUS send_mess(int card, char const *com, char *name)
     cntrl = (struct MMcontroller *) motor_state[card]->DevicePrivate;
 
     pasynOctetSyncIO->write(cntrl->pasynUser, local_buff, strlen(local_buff), 
-                       SERIAL_TIMEOUT);
+                       SERIAL_TIMEOUT, &nwrite);
 
     return(OK);
 }
@@ -399,7 +400,8 @@ static int recv_mess(int card, char *com, int flag)
     struct MMcontroller *cntrl;
     double timeout = 0.;
     int flush=1;
-    int len = 0;
+    int nread = 0;
+    asynStatus status;
     int eomReason;
 
     /* Check that card exists */
@@ -412,24 +414,24 @@ static int recv_mess(int card, char *com, int flag)
         flush=0;
 	timeout	= SERIAL_TIMEOUT;
     }
-    len = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, "\r", 
-                            1, flush, timeout, &eomReason);
+    status = pasynOctetSyncIO->read(cntrl->pasynUser, com, BUFF_SIZE, "\r", 
+                            1, flush, timeout, &nread, &eomReason);
 
-    if (len <= 0)
+    if ((status != asynSuccess) || (nread <= 0))
     {
 	com[0] = '\0';
-	len = 0;
+	nread = 0;
     }
     else
     {
-	com[len-1] = '\0';
+	com[nread-1] = '\0';
 	/* Test for "system error" response. */
 	if (strncmp(com, "SE", 2) == 0)
 	    errlogMessage("recv_mess(): PM500 system error.\n");
     }
 
     Debug(2, "recv_mess(): message = \"%s\"\n", com);
-    return(len);
+    return(nread);
 }